Double salt, process for its preparation and pharmaceutical composition containing it
CA 1238318 A · Owner: Societe Des Produits Nestle S.A. · Inventors: Hirsbrunner, Pierre; Bertholet, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Double salt, process for its preparation and pharmaceutical composition containing it. The double sulfate of 1-desoxy-(5-hydroxytryptamino)- D-fructose (DFS) and 1-methylhydantoin-2-imide (creatinine) represents a new solid crystalline phase of unit composition pharmaceutical quality and remarkable stability. It is prepared by glycosylation of serotonin with Dglucose, formation of the double salt by addition of sulfuric acid and creatinine and crystallization of the double salt in the presence of ethanol. The DFS is preferably isolated from the reaction medium by way of the addition complex DFS.Ca(OH)2 which is precipitated by the addition of calcium hydroxide. The calcium hydroxide is then …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 21, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.